Water-feeding and scale-removing device for steam-boilers.



Patented D00; 9. I902.

in; 7mm.

J. m. HOGARTH v WATER FEEDING AND SCALE REMOVING DEVICE FORSTEAIBOILERS.

(Applic'ltion. filed Apr. 28, 1902.)

(No Model.)

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. UNITED STATES PATENT OFFICE.

TO REGINALD WALTER PRESTON,

TER COUN TY, ENGLAND.

OF CLARE LODGE, WALLASEY,-CHES- WATER-FEEDING AND SCALE-REMOVING DEVICEFOR STEAM-BOILERS SPECIFICATION forming part of Letters Patent No.715,581, dated December 9,1902.

Application r1511 April 28, 1902.

To all whom it may concern.-

Be it known that 1, JOHN MELLRAY H- GARTH, distillery manager, a subjectof the King of Great Britain, residing at Bootle, in

the county of Lancaster, in the Kingdom of England, (whose full postaladdress is Peru? broke road, Bootle aforesaid,) have invented certainnew and useful Improvements in Water-Feeding and Scale-Removing Devicesfor IO Steam-Boilers, (for which application for a patent has been madein Great Britain, No.

8,975, dated April 17, 1902,) of which the following is a specification.

This invention relates to devices for feed- I 5 ing steam-boilers of anytype, and has for its object to arrange the inflow of water so that thescale of fur may be deposited therefrom on plates specially arranged forthe purpose or before the water reaches the flue-surfaces, 20 wherebythe formation of fur on the flues and other parts of the boiler itselfis prevented.

In the accompanying drawings, Figure 1 is a cross-section of a boilerwith my apparatus applied thereto; Fig. 2, a longitudinal section.

' A is the boiler, to which I apply inside a trough B of aboutone-eighth the, length of the boiler. This is supported or hung insidethe boiler above the normal high-water level. 0 The walls of this troughB are preferably V- shaped, though they may be rounded, if preferred;but the walls must be sloped inward at such an angle that wateroverflowing the top of the trough will cling to the walls and flow downthem to the center and finally falling into the water of the boileralong the center line of the latter.\ action takes place best when theupper edges of the troughare somewhat rounded inward. 4o 0 is thefeed-water pipe for supplying this trough with water. The water is fedconstantlyand regularly to the trough; otherwise the overflow of thefeed-water is not sufliciently regular for it to cling to the trough-'wall in a sheet, as required. The feed-water is fed by meansof a pump,which is adjusted so as to regularly supply as nearly as possible therequired amount of water to maintain the proper level in the boiler, thepipe 0 from the pump being by preference carried through the water inthe boiler and discharged into I have found that this Serial No.105,075. (No'modeL) the trough B near the bottom, preferably at one end.The trough is suspended by means of hangers D, bolted to the'boiler-topand to cross-bars E, connecting the opposite sides of the trough.

The action of the device is as follows: The entering water is heatedpractically up to boil ing temperature in the trough B, as the latter isin the steam-space or hottest zone of the boiler, and consequently thesalts which are deposited from the water at the boiling temperature arethrown down as a sort of precipitate in the .water near the top of thistrough, and as the overflow takes place the scale is largely depositedon the outer walls of the trough owing to the way in which the waterclings to them in falling. Any of the sediment which may not collect onthese plates falls to the bottom of the boiler and may be removed whendesired through the mud-hole. Thus it will be seen that practically allthe scale is deposited from thewater before it comes into contact withthe flues,

and consequently practically no deposit takes place on the latter or onthe sides of the boiler itself.

The invention though shown applied to a I Lancashire boiler can beapplied to a boiler of any other type.

I declare that what I claim is 1. A feed-water mechanism forboilers,comprising a trough triangular in cross-section suspended in thesteam-space of a boiler, means for introducing water into the saidtrough at the lower part thereof, in such manner that the water shallrest in the trough and run down the inclined sides of the said troughwhen overflowing the same, horizontally-arranged braces connecting theinterior walls of the said trough and vertical rods connecting saidbraces with the wall of the boiler, whereby the trough is supported inposition, substantially asset forth.

2. A scale-preventing device for steamboilers, comprising an elongatedtrough having its longitudinal sides tapered downward for the greaterportion of its depth, the upper edges of said sides being curvedinwardly, means for introducing feed-water into the bottom of thetrough, bars extending across the interior of the trough, rodsconnecting said bars with the wall of the boiler, thus supporting thetrough in position, the curved upper edge of the trough tending to causethe water when overflowing said trough to run down the sides thereof,and the tapering arrangement of said sides causing the water to dropfrom the bottom central portion of said trough, substantially as setforth.

3. A scale preventing device for steamboilers, comprising a troughsuspended in the steam-space of a boiler and provided with a1ongitudinally-extending ridge along the bottom thereof, tapering sidesleading thereto from the open top of the trough, and means forintroducing feed-water in the trough, the tapering sides causing theWater to run downwardly to the ridge at the bottom of the trough beforedropping into the boiler so that scale or foreign substances will bedeposited on the sides of the trough, substantially as described.

In witness whereof I have hereunto signed my name, this 19th day ofApril, 1902, in the presence of two subscribing witnesses.

JOHN MELLRAY HOGARTH.

Witnesses:

G. C. DYMOND, F. P. EVANS.

